Improvement in pipe-coupling



dimmi Stada ROWLAND HILL, OF EAST BOSTON, MASSACHUSETTS.

Letters Patent N 96,914, dated November 16, 1869.

IMPROVEMENT IN PIPE-CO'IJ'IPLING.V

The Schedule referred to in mese Letters Patent and making part of the same f To all persons to whom these presents may come:

Be it known that I, ROWLAND HILL, of East Boston, of the county of Suolk, and State of Massa-- chusetts, have invented a new and useful or Improved Pipe-Coupling; and do hereby declare thc same to be fully described in the following specification, and represented in the accompanying drawings, ot which- Fgure 1 is a side view of it, and two pipes as coupled by it.

Figure 2 isla longitudinal section of it and the two pipes.

Figure 3 is a side vNew, and l Figure 4, an end view of the duplex tapering thimble employed with the cap-tube and annular screws, for effecting the coupling of the pipes.

In' the drawings, A and B denote the two pipes.

Each of such pipes, previous to being coupled to the other, is to have its end which is to enter the coupling expanded by a vcone driven into such end.

Before, however, doing this, one of theA annular screws O O is to be slipped on the pipe,'so as to eucompass it.

These screws, formed as represented in the drawings, have the thread ot' one pitched in a direction opposite to that of the other in a word, one is a right and the other a left screw, the same being so that when the two screws are screwed into or are in engagement with their common tubular nut I), the revolution of such nut in one direction shall ,cause the screws'to simultaneously approach one another, provided they do not revolve, and when the nut is revolved in the opposite direction, it 'shall cause the screws to recede from one another, provided they do not revolve.

The tubular nut D is a short prismatic tube, having la cylindrical bore, provided with reversed female screws a b, to receive the tubular male screws O (l, cach of which has a prislnatic externa-l surface to en? able a wrench to be applied to it.

The thimble seen at E is a short tube, tapered externally from, its middle toward both of its ends, the tube being largest in diameter a-t itsmiddle.

The two pipes A B having had the two screws C C arranged on them, and having had their ends expandedby means as described, are to be insertedinto the tubular nut I), and upon the duplex tapering thimlile E, iu manner as shown in tig. 2, after which the two screws should be held from revolving, and the tubular nut D should be revolved so as to cause the screws G C to approach one another and crowd the pipes toward each other and upon the two tapers of the thimble. The thimble, in the mean time, will expand the pipes into the tubular nut, and against the bore thereof, so as to make close joint-s. Generally the two pipes will be-crowded together at` their ends so as there to make a tightjoint.

I make no claim to the piln-eniplingas represented and claimed in the United States patent, No. 91,319, granted June 15,1869,to` James J. Fitield, wherein two wedge-rings are employed with a'duplex bellmonth coupling-pipe, and with two screw-nuts, the latter heilig screwed on the external surface oi' the coupling-pipe.

l make use of a single double tapering thimble to go into both pipes to bc coupled, and I also employ two annular screws to screw into the tubular uut, and against the pipes, so as to crowd them on the thimble, and thereby expand them and set them together or toward one another. Thus, my coupling differs materially in construction, as well as in mode of operation, from that ofFiu'eld, although the twoare som ewhat analogous.

l claim, as my invention- The pipe-coupling, as hereinbefore described, as composed of the right and left or annular screws-O G, the tubular uutD, and the duplex tapering t-himblc E, the whole being to operate wth'and couple two pipes, substantially in the manner as specified.

i ROWLAND HILL.

fitnessesz 1t'. H. EDDY, S. N. PIPER. 

